Move transport-independent parts of USB HID support to different subsystem

[wulf]

Summary

Should be no-op.

This review is subset of https://reviews.freebsd.org/D27777

[manu]

Maybe add a note in UPDATING as we now need another device entry for people running full custom kernel config.

[• hselasky]

Looks good. Just make sure stand/usb still builds after this change.

[wulf]

In D27867#623249, @manu wrote:

Maybe add a note in UPDATING as we now need another device entry for people running full custom kernel config.

See https://reviews.freebsd.org/D28019

[wulf]

Close it as committed. For unknown reason commit hook did not make this.
https://cgit.freebsd.org/src/commit/?id=67de2db2623a10dc4edec1642b2f8685d5587d7f

[emaste]

I suspect the lower case 'r' in revision